Question

# Which disease or disorder is the result of having an extra chromosome?

- Cystic Fibrosis
- Hemophilia
- Colorblindness
- Down Syndrome

Hint:

### The disorder causes trisomy of chromosome 21.

## The correct answer is: Down Syndrome

### Down syndrome or chromosome 21 trisomy is a type of chromosomal genetic disorder. Chromosomal genetic disorder refers to change in the structure of a chromosome due to addition or deletion of chromosomal segments during cell division.

In Down syndrome, the chromosome 21 will have an additional chromosome due to improper division during meiosis. The individual will posses problems in the nervous system and lack intellectual skills.

- Down syndrome is also termed as trisomy 21
- Individuals posses an extra chromosome at 21 position
- Trisomy 21 is caused due to improper separation of chromosomes during meiosis
- Cystic fibrosis is an autosomal recessive disorder
- Color blindness is an autosomal dominant disorder
- Hemophilia is a monogenic genetic disorder

### Related Questions to study

### Which disease or disorder is caused by the inheritance of two mutated alleles?

- Cystic fibrosis results in breathing disorder of the affected individual due to increased thick mucus secretion
- The disorder is caused due to alteration in CFRT gene
- It is a type of autosomal recessive disorder, having both copies of gene altered in a cell
- Other disorders mentioned are not autosomal recessive in nature

### Which disease or disorder is caused by the inheritance of two mutated alleles?

- Cystic fibrosis results in breathing disorder of the affected individual due to increased thick mucus secretion
- The disorder is caused due to alteration in CFRT gene
- It is a type of autosomal recessive disorder, having both copies of gene altered in a cell
- Other disorders mentioned are not autosomal recessive in nature

### What is the evolutionary purpose of cells that undergo crossing over?

### What is the evolutionary purpose of cells that undergo crossing over?

### When does chromosomal crossover occur?

### When does chromosomal crossover occur?

### Chromosomal crossover is the natural pairing up and exchanging of genetic material between

### Chromosomal crossover is the natural pairing up and exchanging of genetic material between

### Which of the following does not cause variation?

### Which of the following does not cause variation?

### What is the structural and functional unit of heredity?

### What is the structural and functional unit of heredity?

### If a car moves 4 m to the east and 6 m to the north, then find the resultant and the direction of the car.

### If a car moves 4 m to the east and 6 m to the north, then find the resultant and the direction of the car.

### If Tan A = 1, find the value of A as direction

### If Tan A = 1, find the value of A as direction

### The angle between the vector is more than 90 degrees, then the vectors are

### The angle between the vector is more than 90 degrees, then the vectors are

### If a vector has zero magnitude, then the vector is called as

Null vector is a directionless vector whose magnitude is zero and the resultant vector of two or more equal vectors that are acting opposite to each other.

### If a vector has zero magnitude, then the vector is called as

Null vector is a directionless vector whose magnitude is zero and the resultant vector of two or more equal vectors that are acting opposite to each other.

### Parallelogram law is used when _______

In parallelogram law of vector addition, it says that if we place two vectors so they have the same initial points(the tails are connected) and then complete the vectors into a parallelogram, then the sum of the vectors is directed diagonal that starts at the same point as the vectors.

### Parallelogram law is used when _______

In parallelogram law of vector addition, it says that if we place two vectors so they have the same initial points(the tails are connected) and then complete the vectors into a parallelogram, then the sum of the vectors is directed diagonal that starts at the same point as the vectors.

### If two vectors moved 5 m and 5 m, respectively, to the east and north direction, and the angle between the vectors is 90 degrees, then find the direction of the resultant?

### If two vectors moved 5 m and 5 m, respectively, to the east and north direction, and the angle between the vectors is 90 degrees, then find the direction of the resultant?

### Two vectors started from the origin and moved to the east and north direction 10 m, 15 m, respectively, and the angle between the vectors is 30 degrees, then find the resultant of the vectors.

If two vectors A and B with magnitude a and b respectively are given and the angle between them is θ Then the magnitude of the Resultant of A and B is R =

### Two vectors started from the origin and moved to the east and north direction 10 m, 15 m, respectively, and the angle between the vectors is 30 degrees, then find the resultant of the vectors.

If two vectors A and B with magnitude a and b respectively are given and the angle between them is θ Then the magnitude of the Resultant of A and B is R =